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MAYO, on NEW ll/.lACI-IIlTl.v FOR FINISHING. BRICKS.

To all whom iti concern;

Be it known that I, W. S. MAYo, of the city, county, and State of NewYork, have invented a new and Improved Machine for Finishing Bricks; andI do hereby.l declare that the following is a full,V clear,` and` exactdescription of the same, reference being had to the annexed drawings,making a part of this specification, in which- Figure l, is alongitudinal vertical section of my invention, taken in the line Fig. 3.Fig. 2, is a transverse section of ditto, taken in the line y, y,Fig. 1. Fig. 3, is a horizontal section of ditto, taken in the line e,s, Fig. l. A

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention relates to a new and improved machine for giving a smootheven surface to bricks previous to the burning of the same and afterthey have been properly dried. These unburnt bricks, technically termedclots by being subjected to a requisite pressure within metal molds havetheir sides smoothed and present when burnt a finished appearance,having a smooth,

compact and even surface with angular corners. Bricks of this character,which are generally known as Philadelphia bricks are used for facinghouses of a superior class, and are considerably more expensive onaccount of the labor hitherto required in their manufacture, a greatportion of the labor being due to the ineiciency of the machines usedfor linishing or smoothing the clots.

The object of the within described invention is to expedite and perfectthe finishing or smoothing of the clots, the machine being soconstructed that steam may be used as a motor and Iprovision made forsubjecting each individual clot to the same pressure however much theymay vary in thickness.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A represents a rectangular box, which may be constructed of metal or ofwood. If constructed of wood as shown in the drawings,-the box should belined with metal plates 0;, polished at their inner or exposed sides.The interior of the box A, transversely should be of equal dimensions tothe clots to be operated on, and the box may be of a greater or lesslength as desired, but I prefer having it sufliciently long tocontain`about twenty clots with their plates whichA will belpresently referredto.

B is a plunger which works withinA the boxY A and. is driven: by: acrank wheel C, and connecting rod-r Dbetw.een gui'desfE, E. Between theinner endl of' box A, and' the guides- E', E, a feed; block; F, isplacedandv allowed to slide back and forth transversely a requisite distanceon a bed or bar G, which is attached transversely to the bed H, of themachine. The feed block F, is provided wit-h two rectangular openings b,b', the dimensionsl of which are equal to the clots.

The operation of the machine is as follows The crank pulley C, isrotated by steam, at least it is designed such a motor be used. Theclots designated by I, are placed alternately and edgewise in theopenings b, In', in the feed block F, by boys or attendants, one beingat each side of the machine and the block F, moved so as to bring theopenings b', with their clot alternately in line with the box A, andplunger B,-the latter at each forward movement forcing a clot into thebox A. With each clot I, there is placed in the openings b, b', of thefeed block a metal or wooden plate K. These plates correspond in sizesupercially with the clots I, and are placed at one side of them so thatthe clots in the box A, are not in contact, the plates K, beinginterposed between them. The working of the plunger B, in the box A,forces the clots through the box and the friction of the clots is theonly resistance offered to the action of the plunger. The box A,therefore must be suiciently long to contain a sufficient number ofclots necessary to produce the requisite friction to allow the clots tobe subjected to a necessary pressure. The edges of the clots are,smoothed by being forced through the box, the plates a, imparting thesmoothness to the edges and the plates K, keeping the clots intact sothat they cannot be incorporated together or united under the pressure.

From the above description it will be seen that there is no arbitrary orpositive resistance given the clots I, and each clot will be subjectedto an equal pressure and all perfectly smoothed or finished. In allordinary machines for the purpose that have passed under my observationthe clots have been placed in separate molds,

compressed therein 'and thence forcedI out, and as the clots Will Varysomewhat in size, those that are small Will be imperfectly faced orfinished, While those that are large will be subjected to an unnecessarypressure. This'result is due to the pressing of the clots between theplunger and the bottom of the mold, the clots being thereby subjected toan arbitrary pressure. TheV ordinary machines therefore cannotbelrapidly, driven, nor can the Work be expeditiously performed.

IWould remark that although the box A, is represented and described asbeing in a horizontal position, still itmay be placed in a vertical orinclined position. The posiy y `IW. sMAYo.

Witnesses:

M. M. LIVINGSTON, l MICH HUGHES.

